It is called "reference frame"; and yes, that's the basic idea - related to what will you measure movement.
Motion is relative. There must be something to compare it to.
Inertia is an object's resistance to change it's state of motion or rest. Motion or rest depends on the observer's frame of reference.
A Reference Point A reference point is needed to determine if an object is in motion.
A Reference Point A reference point is needed to determine if an object is in motion.
When an object moves
It is called "reference frame"; and yes, that's the basic idea - related to what will you measure movement.
Motion is relative. There must be something to compare it to.
Inertia is an object's resistance to change it's state of motion or rest. Motion or rest depends on the observer's frame of reference.
Frame of reference is related to motion because reference points enable us to see that an object is moving. ======================== Motion is related to a frame of reference because there is no such thing as 'real' motion or 'real' rest. 'Rest' and 'motion' are always with reference to something else. The book that you are reading is at rest with reference to your lap, your lap is at rest with reference to the seat you're sitting in, and you, the book, and the seat are all at rest with reference to the airplane you're flying in at 400 miles per hour. See what I mean ?
A Reference Point A reference point is needed to determine if an object is in motion.
A Reference Point A reference point is needed to determine if an object is in motion.
motion occurs when an object changes its position relative to a reference point.
A Reference Point A reference point is needed to determine if an object is in motion.
When an object moves
When an object moves
An object is in motion only if its distance from a reference point is changing. The average speed of the object is given by the object's rate of change of displacement from the reference point over time.
motion